package jiu;

/**
 * Created by mc on 2016/7/29.
 */
/*
import java.util.*;
public class ba
{
    public static void main(String[] arges){
        Set numbers = new Treeset();
        numbers.add(1);
        numbers.add(2);
        numbers.add(1);
        numbers.add(3);
        for(Integer number : numbers){
            System.out.println(number);
        }
    }
}
*/
